Axis Video Server AXIS 241SA User manual

AXIS 241Q, AXIS 241S,

AXIS 241QA and AXIS 241SA

Video Servers

User’s Manual

2 About This Document

This manual is intended for administrators and users of the

AXIS 241Q and AXIS 241S Video Server (firmware release

4.30), and the AXIS 241QA and 241SA Video Server

(firmware release 4.30). It includes instructions for using

and managing the Video Server on your network. Previous

experience of networking will be of use when installing

and using this product. Some knowledge of UNIX or

Linux-based systems would also be beneficial, for

developing shell scripts and applications. Later versions of

this document will be posted to the Axis Website, as

required. See also the product’s online help, available via

the Web-based interface.

Safety Notices Used In This Manual

Caution! - Indicates a potential hazard that can damage the

product.

Important! - Indicates a hazard that can seriously impair

operation.

Do not proceed beyond any of the above notices until you

have fully understood the implications.

Intellectual Property Rights

Axis AB has intellectual property rights relating to

technology embodied in the product described in this

document. In particular, and without limitation, these

intellectual property rights may include one or more of the

patents listed at http://www.axis.com/patent.htm and one

or more additional patents or pending patent applications

in the US and other countries.

This product contains licensed third-party software. See the

menu item “About” in the product’s user interface for more

information.

Legal Considerations

Camera and audio surveillance can be prohibited by laws

that vary from country to country. Check the laws in your

local region before using this product for surveillance

purposes. This product includes one (1) MPEG-4 decoder

license. To purchase further licenses, contact your reseller.

Electromagnetic Compatibility (EMC)

This equipment generates, uses and can radiate radio

frequency energy and, if not installed and used in

accordance with the instructions, may cause harmful

interference to radio communications. However, there is no

guarantee that interference will not occur in a particular

installation. If this equipment does cause harmful

interference to radio or television reception, which can be

determined by turning the equipment off and on, the user is

encouraged to try to correct the interference by one or

more of the following measures: Re-orient or relocate the

receiving antenna. Increase the separation between the

equipment and receiver. Connect the equipment to an

outlet on a different circuit to the receiver. Consult your

dealer or an experienced radio/TV technician for help.

Shielded (STP) network cables must be used with this unit

to ensure compliance with EMC standards.

USA - This equipment has been tested and found to

comply with the limits for a Class B computing device

pursuant to Subpart B of Part 15 of FCC rules, which are

designed to provide reasonable protection against such

interference when operated in a commercial environment.

Operation of this equipment in a residential area is likely to

cause interference, in which case the user at his/her own

expense will be required to take whatever measures may be

required to correct the interference.

Europe - This digital equipment fulfills the requirements

for radiated emission according to limit B of EN55022/1998,

and the requirements for immunity according to EN55024/1998

residential, commercial, and light industry.

Liability

Every care has been taken in the preparation of this manual;

Please inform your local Axis office of any inaccuracies or

omissions. Axis Communications AB cannot be held responsible

for any technical or typographical errors and reserves the right

to make changes to the product and manuals without prior

notice. Axis Communications AB makes no warranty of any

kind with regard to the material contained within this

document, including, but not limited to, the implied warranties

of merchantability and fitness for a particular purpose. Axis

Communications AB shall not be liable nor responsible for

incidental or consequential damages in connection with the

furnishing, performance or use of this material.

Trademark Acknowledgments

Ethernet, Internet Explorer, Linux, Microsoft, Mozilla, OS/2,

UNIX, Windows, WWW are registered trademarks of the

respective holders. QuickTime™ is a trademark of Apple

Computer, Inc., registered in the U.S. and other countries. Java

and all Java-based trademarks and logos are trademarks or

registered trademarks of Sun Microsystems, Inc. in the United

States and other countries. Axis Communications AB is

independent of Sun Microsystems Inc. UPnP™ is a certification

mark of the UPnP™ Implementers Corporation.

Support Services

Should you require any technical assistance, please contact

your Axis reseller. If your questions cannot be answered

immediately, your reseller will forward your queries through

the appropriate channels to ensure a rapid response. If you are

connected to the Internet, you can:

• download user documentation and firmware updates

• find answers to resolved problems in the FAQ database.

Search by product, category, or phrases

• report problems to Axis support staff by logging in to your

private support area

• visit the Axis Support Web at www.axis.com/techsup/

Safety Notice - Battery Replacement

The Video Server uses a 3.0V CR2032 Lithium battery as the

power supply for its internal real-time clock (RTC). This battery

will, under normal conditions, last for a minimum of 5 years.

Low battery power affects the operation of the RTC, causing it

to reset at every power-up. A log message will appear when

battery replacement is required.

The battery should not be replaced unless required!

If the battery does need replacing, observe the following points:

Caution!

• Danger of Explosion if battery is incorrectly replaced

• Replace only with the same or equivalent battery, as

recommended by the manufacturer.

• Dispose of used batteries according to the manufacturer's

instructions.

AXIS 241Q/S/QA/SA Video Servers User’s Manual

Revision 1.1

Dated:November 2005

Part No: 26217

3

AXIS 241Q/S/QA/SA

Table of contents

Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

AXIS 241Q/QA Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

AXIS 241S/SA Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Video Server Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Using the Video Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Accessing the Video Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

The Live View page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Video and Audio Streams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Video Stream Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

MPEG-4 protocols and communication methods . . . . . . . . . . . . . . . . . . . . . . . . . . 15

The AXIS Media Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

How to stream MPEG-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Other methods of accessing the video stream. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Configuring the Video Server. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Accessing the Setup tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Video & Image Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Image Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Video Source Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Overlay/Mask Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Advanced - MPEG-4 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Quad Stream Settings (AXIS 241QA/SA only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Audio (AXIS 241QA/SA only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Audio Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Live View Config . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

HTML Examples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

External Video. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Sequence Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Event Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Event Servers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Event Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Motion Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Port Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Pan Tilt Zoom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Installing PTZ Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

4 AXIS 241Q/S/QA/SA

PTZ Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

PTZ Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

System Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Date & Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Network - Basic TCP/IP Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Network - Advanced TCP/IP Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

SOCKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

SMTP (email) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

SNMP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

UPnP™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

RTP (Multicast)/MPEG-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Ports & Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Advanced. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Resetting to the Factory Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Unit Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

The D-Sub Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

The I/O Terminal Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Schematic Diagram - I/O Terminal Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

COM Ports RS-232 and RS-485 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Y/C to BNC Cable (AXIS 241S/SA only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Checking the Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Upgrading the Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

General performance considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Optimizing your system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Frame rates - Motion JPEG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Frame rates - MPEG-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Bandwidth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

5

AXIS 241Q/S/QA/SA - Product Description

Product Description

This manual is applicable for the following Axis Video Servers:

• AXIS 241S: 1-port video server

• AXIS 241Q: 4-port video server

• AXIS 241SA: 1-port video server including 2-way audio

• AXIS 241QA: 4-port video server including 2-way audio

• Blade versions

The information provided in this manual applies to all models, unless otherwise indicated.

The Video Server is fully featured for security surveillance and remote monitoring needs. It

is based on the AXIS ARTPEC-2 compression chip, and can digitize up to 4 analog video

sources and make these available on the network as real-time, full frame rate Motion JPEG

and/or MPEG-4 video streams.

The AXIS 241Q/241QA has 4 BNC inputs for analog video devices and the AXIS 241S/SA

has 1 BNC input and a matching loop-through output. The AXIS 241S/SA can also

accommodate Y/C video using an Y/C to BNC cable (not included).

The Video Server is equipped with RS-232 and RS-485 ports for connecting third party

PTZ systems. It also has 4 alarm inputs and 4 alarm outputs, which can be used to connect

various third party devices, e.g. door sensors and alarm bells.

The AXIS 241QA/241SA has a Line/Mic In (mono) for connecting an external microphone

or other source producing a line level signal. An active speaker with a built-in amplifier

can be connected to Line Out (mono) to enable two-way communication. Audio

communication can be bi-directional (full-duplex), push to talk (half-duplex) or in one

direction only (simplex).

Up to 20 viewers can access the Video Server simultaneously when using Motion JPEG and

MPEG-4 unicast. Each MPEG-4 viewer requires a separate MPEG-4 decoder license, of

which one is included. Additional licenses can be purchased separately from your Axis

dealer. If using other clients to view the MPEG-4 video stream, no further MPEG-4 decoder

licenses are required.

Video can be viewed in 5 resolutions (up to 4CIF), and image compression is configurable.

The Video Server contains support for video motion detection, which allows the unit to

trigger on activity in the video image, and advanced scheduling tools which can also be

used to trigger an event. As the Video Server is designed for use in security systems, it is

equipped with several security features, such as IP address filtering, several user levels with

passwords and HTTPS.

6 AXIS 241Q/S/QA/SA - Product Description

The Video Server has a built-in web server, providing full access to all features through the

use of a standard browser. The built-in scripting tool allows basic applications to be

created, providing basic surveillance solutions. For advanced functionality, the Video

Server can be integrated via the use of the AXIS HTTP API (see www.axis.com/developer).

AXIS 241Q/QA Front Panel

Indicators - After completion of the startup and self-test routines, the multi-colored

Network, Status and Power Indicators flash as follows:

Network

Unlit No connection.

Green Steady for connection to a 100 Mbit/s network. Flashes for network activity.

Amber Steady for connection to a 10 Mbit/s network. Flashes for network activity.

Status

Unlit When configured for “no flash” on camera access.

Green Steady for normal operation. Can be configured to flash green at intervals

whenever the camera is accessed. See the online help for more information.

Amber Steady during startup, reset to factory default or when restoring settings.

Red Slow flash for failed upgrade.

Power Green Normal operation.

Amber Flashes green/amber during firmware upgrade.

AXIS 241Q

AXIS 241QA

Control Button

7

AXIS 241Q/S/QA/SA - Product Description

DIP Switches - A corresponding line termination switch for each of the supported video

inputs. All units are shipped with the line termination enabled for each supported video

input; that is, with the DIP switches set in the down-position.

Note: If the video source is to be connected in parallel with other equipment, disable the input termination by

turning the corresponding DIP switch to the up-position (OFF). Failure to do so may cause reduced image

quality.

Control Button - Press this button to restore the factory default settings, as described in

Resetting to the Factory Default Settings, on page 53, or to install using AXIS Internet

Dynamic DNS Service (See AXIS 241Q/S/QA/SA Video Server Installation Guide).

Video Inputs - Accommodates up to 4 separate video sources (VIDEO 1 - VIDEO 4)

simultaneously. Each supported video input is connected using a coax/BNC connector.

Physical connections made using e.g. 75 Ohm coax video cable have a recommended

maximum length of 800 feet (250 meters).

Line Out (AXIS 241QA only) - Mono audio output (line level), which can be connected to a

public address (PA) system or an active speaker with a built-in amplifier. A pair of

headphones can also be attached.

Line/Mic In (AXIS 241QA only) - One 3.5mm input for a mono microphone, or for line-in

mono signal (only the left channel is used from a stereo signal).

8 AXIS 241Q/S/QA/SA - Product Description

AXIS 241S/SA Front Panel

Indicators - After completion of the startup and self test routines, the multi-colored

Network, Status, Power Indicators flash as follows:

DIP Switches - upon delivery the AXIS 241S/SA is configured for composite video input.

Note: If the AXIS 241S/SA is to be connected in loop-through with other equipment, disable the input termina-

tion by setting switch 1 to the up-position (OFF). Failure to do this may cause reduced image quality.

Control Button - Press this button to restore the factory default settings, as described in

Resetting to the Factory Default Settings, on page 53, or to install using AXIS Internet

Dynamic DNS Service (see AXIS 241Q/S/QA/SA Video Server Installation Guide).

Network

Unlit No connection.

Green Steady for connection to a 100 Mbit/s network. Flashes for network activ-

ity.

Amber Steady for connection to a 10 Mbit/s network. Flashes for network activity.

Status

Unlit When configured for “no flash” on camera access.

Green Steady for normal operation. Can be configured to flash green at intervals

whenever the camera is accessed. See the online help for more informa-

tion.

Amber Steady during startup, reset to factory default or when restoring settings.

Red Slow flash for failed upgrade.

Power Green Normal operation.

Switch 1234

Description 75 ohm video in

termination

75 ohm video out

termination

Connects video in and

video out

Not used

Composite video input on off on n/a

Y/C video input on on off n/a

AXIS 241S

AXIS 241SA

Control Button

9

AXIS 241Q/S/QA/SA - Product Description

Video Input - Coaxial BNC connector supporting a single composite video source. The

physical connection is made using 75 Ohm coax video cable with a recommended

maximum length of 800 feet (250 meters).

Note: The AXIS 241S/SA supports conversion between composite video and Y/C (S-video) using an Y/C to BNC

cable.

Video Output - A single video loop-through (VIDEO OUT) connected in parallel with

VIDEO IN and terminated with a coax/BNC connector. Allows direct connection of e.g. an

external monitor. Set DIP switch to OFF when in use.

Line Out (AXIS 241SA only) - Mono audio output (line level), which can be connected to a

public address (PA) system or an active speaker with a built-in amplifier. A pair of

headphones can also be attached.

Line/Mic In (AXIS 241SA only) - One 3.5mm input for a mono microphone, or for line-in

mono signal (only the left channel is used from a stereo signal).

10 AXIS 241Q/S/QA/SA - Product Description

Video Server Rear Panel

Power Supply Connector - A single socket for connection of the PS-K power adapter.

I/O Terminal connector - The I/O Terminal connector provides the physical interface to 4

digital transistor outputs, 4 digital inputs and an RS-485 interface. See Unit Connectors, on

page 54 for more information.

Note: The I/O Terminal connector also provides an auxiliary connection point for DC

power.

Network Connector - The Video Server connects to the network via a standard network

cable, and automatically detects the speed of the local network segment

(10BaseT/100BaseTX Ethernet).

RS-232 Serial Connector - A 9-pin D-sub connector providing an RS-232 serial

connection. Typically used for connecting Pan/Tilt/Zoom devices. See Unit Connectors, on

page 54 for more information.

The Serial Number is

located on the label

on the underside of

the unit.

11

AXIS 241Q/S/QA/SA - Using the Video Server

Using the Video Server

The Video Server can be used with most standard operating systems and browsers. The

recommended browser is Internet Explorer with Windows, and Mozilla with other

operating systems. See also the Technical Specifications, on page 63.

Note: For information on installing the Video Server, please refer to the Installation Guide.

Accessing the Video Server

1. Start your browser.

2. Enter the IP address or host

name of the Video Server in

the Location/Address field of your browser.

3. Enter the user name and password set by the administrator.

4. A video image is displayed in your browser.

12 AXIS 241Q/S/QA/SA - Using the Video Server

Notes: •To view streaming video in Microsoft Internet Explorer, you must set your browser to allow the

AXIS Media Control (AMC) to be installed on your computer. AMC is required to use audio in the

AXIS 241QA/SA. AMC also provides an MPEG-4 decoder for viewing MPEG-4 video streams. This

decoder is installed the first time an MPEG-4 video stream is accessed. Please note that the

product administrator may have disabled the installation of the decoder, as a license is required

for each instance. See page 31 for more information.

•If your workstation restricts the use of additional software components, the Video Server can be

configured to use a Java applet for updating JPEG images. Please see the online help for more

information.

The Live View page

If your Video Server has been customized to meet specific requirements, the buttons and

other items described below may or may not be displayed on the Live View page. The

following provides an overview of each available button:

To resize the displayed image, click the View Size buttons: half-size

(x1/2), full-size (x1), x2 or x4. This will not change the resolution of the

image (not available in Sequence Mode).

The Video Format drop-down list allows the video format on the Live

View page to be temporarily changed.

The Output buttons control an output directly from the Live View page. These

buttons are configured under Setup > Live View Config > Layout.

Pulse - click this button to activate the port for a defined period of time, e.g. to

switch on a light for 20 seconds.

Active/Inactive - click these buttons to manually start and stop a connected

device, e.g. switch a light on/off.

These buttons start/stop the Sequence Mode. This mode is created in Setup >

Live View Config > Sequence mode and automatically displays the view

from 2 or more video sources at set intervals.

From the Source list, select the desired video image(s). The list can

contain internal video sources, external video sources, or the Quad

Stream view (AXIS 241Q/QA only). The Quad Stream option displays

all four video images in one stream.

The Action buttons trigger an event directly from the Live View page. These

buttons are configured under Setup > Live View Config > Layout. Click these

buttons to manually start and stop events.

13

AXIS 241Q/S/QA/SA - Using the Video Server

Audio controls for AXIS 241QA/SA

Note that these AMC toolbar functions can also be accessed by right-clicking in the image.

For information on using Pan/Tilt/Zoom controls, please see Pan Tilt Zoom, on page 38.

Use the Snapshot button to capture a snapshot of the image currently being

displayed in the window. Right-click on the image to save it in on your

computer.

The AMC viewer toolbar (AXIS Media Control) is available in Microsoft Internet

Explorer only and displays the following buttons:

The Play/Stop buttons start and stop the media stream.

The Snapshot button takes a snapshot of the currently displayed image. The

Snapshot function and the target directory for saving snapshots can be configured

from AMC (AXIS Media Control), which is available from the Windows Control

Panel (Internet Explorer only).

Click the View Full Screen button and the video image will fill the entire screen

area. No other windows will be visible. Press Esc (Escape) on your keyboard to

cancel full screen view.

Click the Speaker and Microphone buttons to switch the sound off and on for the

speaker and microphone, respectively.

Use the slider to control the volume on the speaker and microphone.

The volume can be set between 0 and 100.

When using Half-duplex mode, this button toggles between allowing you to speak

and listen. The first icon indicates that you can talk and the speaker attached to the

Video Server will play your voice. The second icon indicates that you will hear

audio from the Video Server, but no audio will be sent to any web clients. When in

simplex talk mode, the icon toggles between allowing you to speak and is dimmed when

you do not want other clients to receive any audio.

14 AXIS 241Q/S/QA/SA - Video and Audio Streams

Video and Audio Streams

The Video Server provides several different video and audio stream formats. The type to

use depends on your requirements and on the properties of your network.

The Live View page in the Video Server provides access to Motion JPEG and MPEG-4

video and audio streams, as well as to single JPEG images. Other applications and clients

can also access these video and audio streams/images directly, without going via the Live

View page.

Video Stream Types

Motion JPEG

This format uses standard JPEG still images in the video stream. These images are then

displayed and updated at a rate sufficient to create a stream that shows constantly updated

motion.

The Motion JPEG stream uses considerable amounts of bandwidth, but also provides

excellent image quality and access to each and every individual image contained in the

stream.

Note also that multiple clients accessing Motion JPEG streams can use different image

settings.

MPEG-4

This is a video compression standard that makes good use of bandwidth, and which can

provide high-quality video streams at less than 1 Mbit/s.

The MPEG-4 standard provides scope for a large range of different coding tools for use by

various applications in different situations, and the Video Server provides certain subsets

of these tools. These are represented as Video object types, which are selected for use with

different viewing clients. The supported video object types are:

•Simple - sets the coding type to H.263

•Advanced Simple - in Axis products, this sets the coding type to MPEG-4 Part 2

AMC (AXIS Media Control) supports both object types, whilst e.g. QuickTime™ requires the

Simple object type.

When using MPEG-4 it is also possible to control the bit rate, which in turn allows the

amount of bandwidth usage to be controlled. CBR (constant bit rate) is used to achieve a

specific bit rate by varying the quality of the MPEG-4 stream. When using VBR (variable

bit rate), the quality of the video stream is kept as constant as possible, at the cost of a

varying bit rate.

15

AXIS 241Q/S/QA/SA - Video and Audio Streams

Notes: •MPEG-4 is licensed technology. The Video Server includes one license for the decoder required

for viewing in AMC. Installing additional unlicensed copies of this decoder is prohibited. To pur-

chase more decoder licenses, contact your Axis reseller.

•All clients viewing the MPEG-4 stream must use the same image settings.

MPEG-4 protocols and communication methods

To deliver live streaming video over IP networks, various combinations of transport

protocols and broadcast methods are employed.

• RTP (Real-Time Transport Protocol) is a protocol that allows programs to manage the

real-time transmission of multimedia data, via unicast or multicast.

• RTSP (Real-Time Streaming Protocol) serves as a control protocol, to negotiate which

transport protocol to use for the stream. RTSP is thus used by a viewing client to start a

unicast session, see below.

• UDP (User Datagram Protocol) is a communications protocol that offers limited service

for exchanging data in a network that uses the Internet Protocol (IP). UDP is an alterna-

tive to the Transmission Control Protocol (TCP). The advantage of UDP is that it is not

required to deliver all data and may drop network packets when there is e.g. network

congestion. This is suitable for live video, as there is no point in re-transmitting old

information that will not be displayed anyway.

• Unicasting is communication between a single sender and a single receiver over a net-

work. This means that the video stream goes independently to each user, and each user

gets their own stream. A benefit of unicasting is that if one stream fails, it only affects

one user.

• Multicast is bandwidth-conserving technology that reduces bandwidth usage by simul-

taneously delivering a single stream of information to multiple network recipients. This

technology is used primarily on delimited networks (intranets), as each user needs an

uninterrupted data flow and should not rely on network routers.

The AXIS Media Control

The recommended method of accessing live video (MPEG-4 and/or Motion JPEG) and

audio from the Video Server is to use the AXIS Media Control (AMC) in Microsoft Internet

Explorer in Windows. This ActiveX component is automatically installed on first use, after

which it can be configured by opening the AMC Control Panel applet from the Windows

Control Panel. Alternatively, right-click the video image in Internet Explorer.

How to stream MPEG-4

Deciding on the combination of protocols and methods to use depends on your viewing

requirements, and on the properties of your network. Setting the preferred method(s) is

done in the control applet for AMC, which is found in the Windows Control Panel. When

this has been set, AMC will test all the selected methods in the specified order, until the

first functioning one is found.

16 AXIS 241Q/S/QA/SA - Video and Audio Streams

RTP+RTSP

This method (actually RTP over UDP and RTSP over TCP) should be your first

consideration for live video, especially when it is important to always have an up-to-date

video stream, even if some images do get dropped. This can be configured as multicast or

unicast.

Multicasting provides the most efficient usage of bandwidth, especially when there are

large numbers of clients viewing simultaneously. Note however, that a multicast broadcast

cannot pass a network router unless the router is configured to allow this. It is thus not

possible to multicast over e.g. the Internet.

Unicasting should be used for video-on-demand broadcasting, so that there is no video

traffic on the network until a client connects and requests the stream. However, if more

and more unicast clients connect simultaneously, the server will at some point become

overloaded. There is also a maximum of 20 simultaneous viewers to be considered.

RTP/RTSP

This unicast method is RTP tunneled over RTSP. This can be used to exploit the fact that it

is relatively simple to configure firewalls to allow RTSP traffic.

RTP/RTSP/HTTP or RTP/RTSP/HTTPS

These two methods can also be used to traverse firewalls. Firewalls are commonly

configured to allow the HTTP protocol, thus allowing RTP to be tunneled.

Other methods of accessing the video stream

Video/images from the Video Server can also be accessed in the following ways:

• If supported by the client, the Video Server can use Motion JPEG server push to display

video. This option maintains an open HTTP connection to the browser and sends data as

and when required, for as long as required.

• As single JPEG images in a browser. Enter e.g. the path:

http://<ip>/axis-cgi/jpg/image.cgi?resolution=CIF

• Windows Media Player. This requires AMC and the MPEG-4 decoder to be installed. The

paths that can be used are listed below, in the order of preference.

• Unicast via RTP: axrtpu://<ip>/mpeg4/#/media.amp

• Unicast via RTSP: axrtsp://<ip>/mpeg4/#/media.amp

• Unicast via RTSP, tunneled via HTTP: axrtsphttp://<ip>/mpeg4/#/media.amp

• Unicast via RTSP, tunneled via HTTPS: axrtsphttps://<ip>/mpeg4/#/media.amp

• Multicast: axrtpm://<ip>/mpeg4/#/media.amp

Notes: • <ip> = IP address.

• # = video source number or the quad stream. This is set to 1 if omitted.

17

AXIS 241Q/S/QA/SA - Video and Audio Streams

Other MPEG-4 clients

Although it may be possible to use other clients to view the MPEG-4 stream, it is not

guaranteed to work in all cases.

For some other clients, e.g. QuickTime™ the Video Object Type must be set to Simple. It

may also be necessary to adjust the advanced MPEG-4 settings.

To assess the video stream from e.g. QuickTime™ the following path can be used:

rtsp://<ip>/mpeg4/#/media.amp

This path is for all supported methods, and the client will negotiate with the Video Server

to determine exactly which transport protocol to use.

Notes: • <ip> = IP address.

• # = video source number or the quad stream. This is set to 1 if omitted.

Audio transmission methods

The audio stream can be accessed in the Live View page when viewing either Motion JPEG

or MPEG-4.

Using Motion JPEG

The basic transmission method of audio used in conjunction with Motion JPEG video

streaming is transmission over HTTP. The video and audio streams are not synchronized

when using Motion JPEG so the streams may be slightly out of sync. The latency in any

stream should be low, but this will depend on the network infrastructure.

Using MPEG-4

When using MPEG-4, audio is streamed using the same protocol as the video stream.

When audio is transmitted using MPEG-4, the Axis product sends synchronization

information along with the streams to the client that is performing the synchronization.

Note: Audio is streamed from the client to the server over HTTP when using Motion JPEG and MPEG-4.

Accessing the Audio Streams

In addition to accessing audio in the Live View page using AMC, audio from the Video

Server can also be accessed in the following ways:

HTTP-API

You can read about accessing audio for the other protocols through the HTTP-API at

http://www.axis.com/techsup

QuickTime/Windows Media Player

It is possible to use QuickTime and Windows Media Player to listen to the audio stream

using the same methods to access video streams.

18 AXIS 241Q/S/QA/SA - Video and Audio Streams

Java Applet

The Java applet supports simplex audio.

19

AXIS 241Q/S/QA/SA - Configuring the Video Server

Configuring the Video Server

This section describes how to configure the Video Server and is intended for:

•administrators, who have unrestricted access to all the Setup tools

•operators, who have access to the Video & Image, Audio, Live View Config and Event

Configuration settings.

The Video Server is configured from the Setup link, in a standard browser (see also the

Technical Specifications on page 63).

Accessing the Setup tools

Follow the instructions below to access the Setup Tools from a browser.

1. Start the browser and enter the IP address or host name of the Video Server in the

location/address field.

2. The Live View page is now displayed. Click Setup to display the Setup tools.

Setup

20 AXIS 241Q/S/QA/SA - Video & Image Settings

Video & Image Settings

The following descriptions show examples of the available features in the Video Server.

For details of each setting, please refer to the online help available from each page.

Click to access the online help.

Image Settings

Image Appearance

Modify the Image Appearance to optimize the video images according to your

requirements.

All configuration of images and overlays will affect the performance of the Video Server,

depending on the usage and the available bandwidth.

• High resolution generates larger files

• Lower compression improves image quality, but generates larger files

• Black & White uses less bandwidth than Color

• Rotating the image 90 or 270 degrees will lower the maximum frame rate

See also the specifications for frame rates and bandwidth on page 67.

Page is loading ...

Axis Video Server AXIS 241SA User manual

This manual is also suitable for

Axis Video Server AXIS 241SA User manual

Related papers

Other documents